Type-writing machine.



No. 807,919. PATENTED DEC. 19, 1905. B. PAHL. TYPE WRITING MACHINE.APPLIOATION FILED 0015, 1904 2 SHEETS-SHEET 1.

on a m F M W E PATENTED DEC. 19, 1905.

E N I H C A M MG Pm H R W E P. Y T

APPLICATION FILED OCT, 5, 1904.

2 SHEETSSHBET 2.

i I INVENTOR 2 E Fahl M TTOB/VEV UNITED STATES PATENT OFFIOE.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application filed October 5, 1904. Serial No. 227,194.

To all whom it may concern:

Be it known that I, EUGENE FAHL, a citizen of the United States,residing at the city of St. Louis, in the State of Missouri, haveinvented a certain new and useful Type-Writing Machine, of which thefollowing is such a full, clear, and exact description as will enableany one skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, forming part ofthis specification.

My invention relates to a type-writing machine, and more particularly tothe type-bars and the mechanism for operating the same.

In the accompanying drawings, which show so much of one form of atype-Writing machine as is necessary to illustrate my invention, Figure1 is a section on the line 1 1 of Fig. 5. Fig. 2 is a slightly-enlargedsection through one side of the base of the machine, taken on the line 22 of Fig. 5. Figs. 3 and 4 are an enlarged side and edge view,respectively, of one of the washers for separating the type-bars. Fig. 5is a section on the line 5 5 of Fig. 1, and Fig. 6 is a side view of thepart shown in Fig. 2.

Like marks of reference refer to similar parts in the several views ofthe drawings.

10 represents the base of the machine. The

.base carries two side frames 11, which are connected by crossbars 12.Supported above the side frames 11 is the paper roll or platen 15. Thispaper roll or platen 15 is carried by any usual form of carriage. (Notshown.)

Situated between the side frames 11 is a movable frame which carries thetype-bars and the actuating mechanism therefor. This movable frameconsists of two side pieces 16 and a center piece 17. These pieces areconnected by a pair of combs 18 and 19 and also by a curved cross-piece20, Which acts as a stop for the type-bars, as will be hereinafterdescribed. The pieces 16 and 17 of the frame are also connected by meansof a cylindrical bar 21, which is rotatively mounted in said pieces. Thecentral part of this bar 21 is somewhat flattened at the front side andhas connected to it the key-bars, as will be hereinafter described.

The center piece 17 carries at its upper end a curved bar 25, which issquare in cross-section, so as to fit the square openings formed in thecenters of wedge-shaped washers 27. Each of 'these washers 27 has on oneface a boss 28, which surrounds the square openings 26. The washers 27are placed over the curved bar 25, and the type-bars are placed over thebosses 28 of the washers 27 The typebars 30 are provided on their endswith a double set of characters 31 in the usual manner. The inner end ofeach type-bar is made in the form of a hub 32, provided with teeth.These teeth on the hub 32 mesh with the teeth on a rack 33, each of saidracks 33 being car ried on the upper end of an L-shaped keybar 34. Thewashers 27 also act as guides for the racks 33, as will be clearlyapparent from Fig. 5. After the Washers 27 and typebars 30 are placed inposition on the bar 25 the side pieces 16 of the movable frame are alsoplaced over the said bar, and nuts 35 are placed on the threaded ends ofthe bar to hold the Whole in position. Each of the key-bars 34 hassecured to it at the elbow a spring 36. This spring 36 is rigidlysecured to the bar by soldering it thereto or in any other suitablemanner. The springs are then secured to the flattened face of thecross-bar 21 by means of screws 37 The bar 21 is made rotatable in theupright pieces 16 and 17, and it is provided near its central part withteeth 38. These teeth 38 engage with a worm 39, carried on the centralupright 17. This worm 39 is provided with a milled head 40, by means ofwhich it can be rotated to move the bar 21 on its axis, and thus changethe tension of the springs 36. The forward ends of the horizontalportions of the key-bars 34 are provided with keys 41 in the usualmanner. As the key-bars 34 vary somewhat in length, it will be necessaryto make a slight variation in the size of the hubs 32 of the type-barsin order to give uniform pressure and stroke to the different keys. Thisvariation, however, is so slight that I have not attempted to show it inthe drawings.

The movableframe carrying the type-bars has pivoted to it four links 42,two being pivoted at one end to each of the side pieces 16. The oppositeends of the upper pair of links 42 are pivoted to lugs 43, carried onthe side frames 11. The opposite end of the lower pair of links 42 arepivoted directly to the said side frames 11. This manner of supportingthe movable frame allows it to move down, so as to shift from one caseto another. The frame is held in its upward position by means ofcoil-springs 45. In order to prevent the accidental lowering of themovable frame, I provide at each side a pivoted cam-plate 46, pivoted tothe side frame 11. This cam-plate 46 is provided with an L-shapedcam-slot 47,

which engages with a pin 48 in the lower end of the side piece 16. Thisnormally and positively locks the frame against movement. The cam-plate46 is also provided with a second L- shaped cam-slot 49, which engageswith a pin 50, carried on the bars 51 of the shift-key. These bars 51are pivoted at 52 to the base of the machine, and the two bars areconnected by a cross-piece 53. As soon as the shift-key is depressed theaction of the pin 50 on the cam-slot 49 swings the plate 46 on itspivot, so as to bring the vertical part of the slot 47 beneath the pin48, and at the same time the key-bar 51 comes in contact with the pin48, and thus the further movement of the shiftkey will force the framecarrying the typeloars downwardly, so that the machine is shifted fromone case to another. The bars 51 are held in their normal position bymeans of springs 54, secured at one end to said bars and at the other tothe base of the machine.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is-

1. Ina type-writing machine, the combination with a platen, of a framemovable toward and away from said platen, type-bars connected with saidframe, key-bars for actuating said type-bars and carried by and movablewith said frame, a spring for normally holding said frame in itsposition nearest said platen, and means for moving said frame away fromsaid platen.

2. In a type-writing machine, the combination with a platen, of a framemovable toward and away from said platen, type-bars connected with saidframe, key-bars for actuating said type-bars, a spring for normallyholding said frame in its position nearest said platen, a lock for saidframe, and means for moving said frame away from said platen.

8. In a type-writing machine, the combination with a platen, of a framemovable toward and away from said platen, type-bars connected with saidframe, key-bars for actuating said type-bars and carried by and movablewith said frame, a spring for normally holding said frame in itsposition nearest said platen, a lock for said frame, and means formoving said frame away from said platen.

4. In a type-writing machine, the combination with a platen, of aframemovable toward and away from said platen and normally in its positionnearest said platen, type-bars carried by said frame and cooperatingwith said platen, key-bars also carried by said frame and actuating saidtype-bars, a lock for said frame, and means for releasing said lock,said means being also adapted to move said frame from said platen.

5. In a type-writing machine, the combination with a platen, of a framemovable toward and away from said platen, type-bars carried by saidframe and cooperating with said platen, key-bars for operating saidtype-bars, a spring normally holding said frame in its position nearestsaid platen, means for locking said frame in its position nearest saidplaten, and means for releasing said lock and for mov ing said frameaway from said platen.

6. In a type-writing machine, the combination with a support, of washersnon-rotatively mounted thereon and provided with bosses, type-barspivotally mounted on said bosses, and means for actuating said bars.

7. In a type-writing machine, the combination with a curved support, ofwedge-shaped washers non-rotatively mounted on said support and providedwith bosses, type-bars pivotally mounted on said bosses, and means foractuating the said bars.

8. In a type-writing machine, the combination with a support, oftype-bars surrounding said support and provided with a key, racksengaging with the teeth of said bars, and washers between said bars,said washers acting as guides for said racks.

9. In a type-writing machine, the combination with a curved support, ofwedge-shaped washers non-rotatively mounted on said support and providedwith bosses, type bars mounted on said bosses, and provided with teeth,and racks engaging with the teeth of said bar and sliding between saidwashers.

10. In a type-writing machine, the combination with a platen, of amovable frame, typebars carried by said frame and cooperating with saidplaten, key-bars also carried by said frame and actuating saidtype-bars, means normally locking said frame against movement from saidplaten, and means for releasing said frame and moving it away from saidplaten to shift said type-bars from one case to another.

11. In a type-writing machine, the combination with a platen, of a framemovable toward and away from said platen and normally in its positionnearest said platen, a spring to move said frame toward said platen, alock for retaining said frame in its position nearest said platen,ashift-key,and means operated through said shift-key to release said lockand move said frame away from said platen.

In testimony whereof I have hereunto set my hand and afiixed my seal inthe presence of the two subscribing witnesses.

EUGENE FAHL. [L. s.]

IVitnesses:

D. C. BETJEMAN, JAMEs H. BRYSQN.

